GB353479A - Manufacture of hydroxylated anthrones - Google Patents
Manufacture of hydroxylated anthronesInfo
- Publication number
- GB353479A GB353479A GB251930A GB251930A GB353479A GB 353479 A GB353479 A GB 353479A GB 251930 A GB251930 A GB 251930A GB 251930 A GB251930 A GB 251930A GB 353479 A GB353479 A GB 353479A
- Authority
- GB
- United Kingdom
- Prior art keywords
- anthrone
- hydroxy
- stannous chloride
- hydrochloric acid
- reduction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Hydroxyanthrones.-1-hydroxy-10-anthrones (or the corresponding anthranols) are prepared by subjecting polyalkoyloxyanthraquinones containing a 1-alkoyloxy group to simultaneous reduction and complete deacylation in presence of a mineral acid, for example, with stannous chloride and hydrochloric acid. Suitable alkyl groups are formyl, acetyl or higher aliphatic acyl groups and the reduction takes a different course to that which results from a similar treatment of the parent hydroxy bodies. The products are useful for the manufacture of hydroxybenzanthrones. In examples, triacetylanthragallol is reduced with stannous chloride-hydrochloric acid in the presence of acetic acid to give 1.2.3-hydroxy-10-anthrone. Similar treatment of diacetylalizarin and 1.8-diacetoxy-anthraquinone yields 3.4-dihydroxy-9-anthrone and 1.8-dihydroxy-10-anthrone respectively. Specification 340,639 is referred to. The Provisional Specification relates to the reduction of a -acyloxyanthraquinones generally the acyl group being also benzoyl or carbalkoxy, and includes an example in which tribenzoylanthragallol is reduced with stannous chloride-hydrochloric acid in acetic acid solution to give tribenzoyl-1.2.3-trihydroxy-10-anthrone; this body is saponified with alcoholic potash. The production of 1-hydroxy-10-anthrone from a -acyloxyanthraquinone and of 1-hydroxy-2-methoxy-10-anthrone from acetylalizarin-2-methyl ether is also mentioned.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB251930A GB353479A (en) | 1930-01-24 | 1930-01-24 | Manufacture of hydroxylated anthrones |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB251930A GB353479A (en) | 1930-01-24 | 1930-01-24 | Manufacture of hydroxylated anthrones |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB353479A true GB353479A (en) | 1931-07-24 |
Family
ID=9740981
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB251930A Expired GB353479A (en) | 1930-01-24 | 1930-01-24 | Manufacture of hydroxylated anthrones |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB353479A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2373507A1 (en) * | 1976-12-09 | 1978-07-07 | Bayer Ag | PROCESS FOR PREPARING 4-HYDROXYANTHRONES, AND PRODUCTS OBTAINED BY THIS PROCESS |
-
1930
- 1930-01-24 GB GB251930A patent/GB353479A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2373507A1 (en) * | 1976-12-09 | 1978-07-07 | Bayer Ag | PROCESS FOR PREPARING 4-HYDROXYANTHRONES, AND PRODUCTS OBTAINED BY THIS PROCESS |
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